I don't mean to sound like a technophobe, but why not just do a pen/pencil sketch and post a scan or picture?
That looks like a lot of work with the mouse or stylus! :)
If you understand per-unit straightness (Fig. 8-5 from Y14.5), then cylindricity is somewhat similar: imagine a regular cylindricity zone, but instead of extending for the entire length of the feature, it is only for the designated length. The zone can slide along the feature, allowing some...
Doug, profile is not permitted to be modified with MMC (it's not a feature-of-size thing, but merely a surface or line).
I think the terminology might be confusing. The go/no-go type of gauge that might work with profile isn't what we think of as a typical go/no-go; it's more of a template...
I'll disagree a bit. Paragraph 3.68 defines true profile as requiring basic dims to define the profiled feature itself. It does not mention anything about the feature's relationship to any datums.
If a DRF is imposed but the location dimension to the profiled feature is not basic, then it...
It's not arbitrary; one simply has to look at how the surface (well, line) is related to the datum. And in that case it's not a basic dimension, so we are to understand that it's doing the lower-level control of orientation. That's the specific indication that you're looking for.
I'm sure that...
Yes, it would be controlling flatness (and parallelism, and perpendicularity). But not size and not location. So that's an example of the profile symbols referencing datums yet not doing location.
It is by far more common to have profile linked to its datums with basic dims, though.
A couple of things going on here.... Profile of a surface related to datums always controls form and orientation (unless "T" is given, which nullifies form, but that's rare). It may also control size, and it will do that if a general profile is given for the drawing, as the OP indicated...
The best substitute for concentricity is usually the position symbol, not a runout symbol. That's because runout is a combination of location and form errors. But concentricity didn't really check for form.
Think about an oval shape: its center point could be perfectly concentric with a given...
For the ASME image, they failed to show the dots in the right-side view, and they mistakenly used the term RFS for the datum when it should have been RMB.
Still studying the first one....
TK-421, what is the meaning that you intend to convey with the oval? I've often seen it used as a critical characteristic marker, meaning that it has to be inspected and tracked using statistics.
But if that's the intent, then it doesn't make sense to have an oval around a single limit. The...
I'm not ready to dive into this one with a full answer, but I do know that lower segments of composite position (items 61 and 62) are not simultaneous requirements, even though they have the same datum reference. So the .007 doesn't itself tie the positions of those two holes to one another.
Vincent PW, paragraph 5.4.2 states, "With flatness of a surface, where the considered surface is associated with a size dimension, the flatness tolerance must be less than the size tolerance."
That sentence lays out that we're dealing with surface flatness. The part saying that it's associated...
Burunduk,
The OP stated at the start, "Company uses a datasheet, with standard notes built in, along with an annotated model to completely define MBD parts."
I presume that is the same as a "product definition data sheet" that you're referring to?
Not sure about that. You're saying that, without datum features being identified, it should be treated as an all-over profile (that doesn't need datums)?
I would be inclined to say that the designer didn't intend that, and the callout is an oversight simply because there are datums...
